diff --git a/test/ruby/test_marshal.rb b/test/ruby/test_marshal.rb
index bc5ee62..82e735d 100644
--- a/test/ruby/test_marshal.rb
+++ b/test/ruby/test_marshal.rb
@@ -32,6 +32,24 @@ class TestMarshal < Test::Unit::TestCase
     return f
   end
 
+  class MM
+    attr_reader :calls
+
+    def initialize
+      @calls = []
+    end
+
+    def method_missing name, *args
+      @calls << [name, args]
+    end
+  end
+
+  def test_mm
+    mm = MM.new
+    assert_instance_of(MM, Marshal.load(Marshal.dump(mm)))
+    assert mm.calls.empty?
+  end
+
   def test_marshal
     a = [1, 2, 3, [4,5,"foo"], {1=>"bar"}, 2.5, fact(30)]
     assert_equal a, Marshal.load(Marshal.dump(a))